diff --git a/Cargo.lock b/Cargo.lock
index ece2bec..12361f0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -211,7 +211,7 @@ dependencies = [
 
 [[package]]
 name = "ccs"
-version = "0.1.9"
+version = "0.1.10"
 dependencies = [
  "axum",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index be0ee64..49fc676 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ccs"
-version = "0.1.9"
+version = "0.1.10"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/src/main.rs b/src/main.rs
index dc74c47..b8adf1d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,7 +13,7 @@ use log::LevelFilter;
 use std::io::Write;
 #[macro_use]
 extern crate lazy_static;
-
+const ILLEGAL_CHARS: [char; 10] = ['\\', '/', ':', '*', '?', '"', '<', '>', '|', '\0'];
 async fn get_path(task: &model::Task) -> Result<String, String> {
     let mut groups: Vec<String> = Vec::new();
     if SERVER_CONFIG.short_path {
@@ -39,7 +39,9 @@ async fn get_path(task: &model::Task) -> Result<String, String> {
     }
     if groups.is_empty() {
         let mut contest = task.group.clone();
-        contest = contest.replace(':', "");
+        for illegal_char in ILLEGAL_CHARS.iter() {
+            contest = contest.replace(*illegal_char, "_");
+        }
         groups.push(contest);
         let problem = task.name.clone();
         groups.push(problem);